added examples back into the codebase

Author: isayahc

backend/opencad_agent/service.py

@@ -127,9 +127,10 @@ def _generate_code(self, request: ChatRequest) -> str:
         model = os.environ.get("OPENCAD_LLM_MODEL")
 
         if model:
+            built_system_prompt = build_code_generation_prompt(request.tree_state)
             return self.llm_client.generate_code(
                 model=model,
-                system_prompt=build_code_generation_prompt(request.tree_state),
+                system_prompt=built_system_prompt,
                 user_message=request.message,
                 conversation_history=request.conversation_history,
                 reasoning=request.reasoning,

example/firmware_programmer_fixture.py

@@ -0,0 +1,18 @@
+"""Firmware example: fixture plate for programming headers and alignment pins."""
+
+from opencad import Part, Sketch
+
+
+fixture_profile = (
+    Sketch(name="Programmer Fixture Profile")
+    .rect(70, 40)
+    .circle(2.5, center=(10, 10), subtract=True)
+    .circle(2.5, center=(60, 10), subtract=True)
+    .circle(2.5, center=(10, 30), subtract=True)
+    .circle(2.5, center=(60, 30), subtract=True)
+    .circle(4, center=(25, 20), subtract=True)
+    .circle(4, center=(35, 20), subtract=True)
+    .circle(4, center=(45, 20), subtract=True)
+)
+
+Part(name="Programmer Fixture").extrude(fixture_profile, depth=5, name="Fixture Plate")

example/software_hmi_panel.py

@@ -0,0 +1,19 @@
+"""Software example: operator panel for a display, buttons, and encoder access."""
+
+from opencad import Part, Sketch
+
+
+panel_profile = (
+    Sketch(name="HMI Panel Profile")
+    .rect(120, 70)
+    .circle(6, center=(20, 18), subtract=True)
+    .circle(6, center=(40, 18), subtract=True)
+    .circle(6, center=(60, 18), subtract=True)
+    .circle(6, center=(80, 18), subtract=True)
+    .circle(6, center=(100, 18), subtract=True)
+    .circle(9, center=(104, 50), subtract=True)
+    .circle(3, center=(12, 58), subtract=True)
+    .circle(3, center=(108, 58), subtract=True)
+)
+
+Part(name="HMI Panel").extrude(panel_profile, depth=3, name="Panel Blank")